问题

答案

I confirmed that the maximum memory box is NOT checked. By the way I noticed that in the same dialogue box there was "Number of Processors" which was not check marked. So, I added a check mark and set the number as 2. I let the system reboot and found that (3.2GB usable) was no longer there. I removed the check mark(& reboot) but (3.2GB usable) did not come back. I did not check the Installed Memory(RAM) immediately prior to doing that change so that i am not sure what caused the (3.2GB usable) to disappear.

Please understand that Microsoft does not provide support to enter the BIOS, modify any of the settings or upgrade the BIOS. It is the responsibility of the computer manufacturer to provide support for the BIOS.

Please confirm with your computer or motherboard manufacture if there is a Memory Remap feature and Execute Disable Bit (for CPU configuration) in BIOS/CMOS, and Enable the functions with the help of the Support Engineer of your computer or motherboard manufacturer.

Note: If you are planning to buy a new DIY computer, please confirm with the Motherboard venders that it supports Memory Remap feature.

Suggestion 3: Uncheck the option "Maximum Memory"

============================

1. Click Start, type "MSCONFIG" (without the quotation marks) in the Search Bar and Press Enter to start the System Configuration Utility.

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I confirmed that the maximum memory box is NOT checked. By the way I noticed that in the same dialogue box there was "Number of Processors" which was not check marked. So, I added a check mark and set the number as 2. I let the system reboot and found that (3.2GB usable) was no longer there. I removed the check mark(& reboot) but (3.2GB usable) did not come back. I did not check the Installed Memory(RAM) immediately prior to doing that change so that i am not sure what caused the (3.2GB usable) to disappear.

This is off-topic but it is about "Number of Processors". I never pay attention to this before so that I would think the default setting of no check mark is OK. But I wonder under what circumstance this should be check-marked. My PC is a dual Opteron cpu system(two single core Opterons).

Please understand that Microsoft does not provide support to enter the BIOS, modify any of the settings or upgrade the BIOS. It is the responsibility of the computer manufacturer to provide support for the BIOS.

Please confirm with your computer or motherboard manufacture if there is a Memory Remap feature and Execute Disable Bit (for CPU configuration) in BIOS/CMOS, and Enable the functions with the help of the Support Engineer of your computer or motherboard manufacturer.

Note: If you are planning to buy a new DIY computer, please confirm with the Motherboard venders that it supports Memory Remap feature.

Suggestion 3: Uncheck the option "Maximum Memory"

============================

1. Click Start, type "MSCONFIG" (without the quotation marks) in the Search Bar and Press Enter to start the System Configuration Utility.

Thank you for the detailed solutions for this problem case and I permanently saved your post for my future reference. The problem, however, has gone away now as indicated in one of my previous posts. I do not know for sure whether what I did solved the problem.